First10FibonacciNumbers

// Output:
// First 10 fibonacci numbers:
// 0 1 1 2 3 5 8 13 21 34
class First10FibonacciNumbers
{
    static void Main()
    {
        
        int previous = 0;
        int current = 1;
        System.Console.WriteLine("\nFirst 10 fibonacci numbers recursively:");
        DisplayFibonacciRecursive(previous, current, 10);
        System.Console.WriteLine("\nFirst 10 fibonacci numbers iteratively:");
        DisplayFibonacciIterative(previous, current, 10);
        System.Console.WriteLine();
    }
    static void DisplayFibonacciRecursive(int previous, int current, int count)
    {
        System.Console.Write(previous + " ");
        int next = current + previous;
        previous = current;
        count--;
        if (count == 0) return;
        DisplayFibonacciRecursive(current, next, count);
    }
    static void DisplayFibonacciIterative(int previous, int current, int count)
    {
        System.Console.Write(previous + " ");
        System.Console.Write(current + " ");
        int next;
        for (int i = 2; i < count; i++)
        {
            next = previous + current;
            System.Console.Write(next + " ");
            previous = current;
            current = next;
        }
    }
}